- Students will be able to identify prefixes and words that contain prefixes.
- Students will be able to determine the meaning of words with prefixes.
- Ask students, "What do you think it means when we say 're,' like in 're-do?' "
- Have students try to explain in their own words what "re" means.
- Record some words with the prefix "re" (rerun, retell, redo, repeat, and rewrite) on the board.
- Explain that these are prefixes. A PrefixComes before a word and modifies its meaning. (Something fun to note is that the word "prefix" has a prefix itself.)
Explicit Instruction/Teacher modeling(10 minutes)
- Hand out the What is a Prefix? worksheet to each student.
- Explain that a prefix must go before a Root word, which is also called a base word. For example, "red" does not contain the prefix "re" because "d" is not a root word. Review the example from the Introduction by pointing out that "re" is the prefix and "do" is the root/base word.
- Project your copy of the worksheet on the document camera, and model thinking aloud about the word parts. Circle the words that have prefixes, and then engage students in the think aloud process about what the new word means.
Guided practise(10 minutes)
- Distribute a copy of the Get It Started! worksheet to the students.
- Call on a nonvolunteer to restate the definition of a prefix. Call on another nonvolunteer to give an example of a word with a prefix.
- Put students into small groups of three to four students, and instruct them to complete the worksheet together as a group. They should discuss how they know the correct answers. Prompt them to define each new word they create, discussing the meaning of the root or base word and then how the prefix changes its meaning.
- Gather students' attention and go over the answers as a class.
- Instruct students to share the correct prefix as well as the definition of the new word.
Independent working time(10 minutes)
- Give each student a copy of the Circle the Prefixes! worksheet, and instruct them to complete the worksheet independently.
- Circulate and provide support and feedback as needed during this time.
- Go over the worksheet and prompt students to explain the meaning of the new words formed when the prefixes were added.
Give advanced students an additional challenge during Independent Working Time. Select a common prefix, and have them each write down 10 words that contain it.
- Pull aside struggling students and help them complete their worksheets.
- Give each student an index card for the Exit Ticket and instruct them to write a sentence using one of the following prefixes: re-, un-, or dis-. Have them circle the word with the prefix. Then, have students define that word.
- Utilize the completed worksheet from Independent practise as a formative assessment of the students' mastery of the Learning Objective.
Review and closing(5 minutes)
- Put students into A-B partnerships and have them each share their Exit Ticket sentence. Instruct Partner A to speak first while Partner B listens. Then, have them switch roles.
- Instruct partners to use the same sharing format to review the definition of the key term Prefix.
- Explain that when we understand the meaning of certain word parts, it helps us to understand the meaning of new words. This helps us build a better vocabulary!